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The Mahle OE Plain Ring Set is a bulk plain piston ring pack intended for engine rebuilding tasks. Specified as Napier THM-13 with 4.505in bore, .043in thickness and .135 ring width, this listing is a 48-piece bulk pack suitable where those dimensions match the engine specification, offering OE-style replacement rings for compatible repair and machining work.
Mahle Rings Perf Steel Napier THM-13 4.505in x .043in .135 RW Plain Ring Set (48 Qty Bulk Pack)
